Preparation and Characterization of In-doped Blue-emitting ZnO Nanoparticles

In this study, indium nitrate was utilized as the dopant source for the successful synthesis of indium-doped zinc oxide (IZO) nanoparticles using an ultrasonic method. This method of synthesis is not only straightforward, efficient, and environmentally friendly, but it also allows for precise control of the doping level, effectively tuning the optical properties of the nanoparticles. A series of advanced characterization techniques were employed, including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible spectroscopy, photoluminescence, and scanning electron microscopy (SEM), to characterize the synthesized nanoparticles. It was observed that, upon excitation at a fixed wavelength, the emission color of the IZO nanocrystals gradually shifted from yellow to blue with an increase in indium doping concentration. These results indicate that IZO nanoparticles are a promising candidate material for lighting applications.